Ernest quast



(No Model.)

E. QUAST.

LIFTINGJAGK.

No. 264,752. Patented Sept. 19, 1882.

WITNESSES INVENTOR .l im gmwgmw UNITED STATES PATENT OFFICE.

ERNEST QUAST, F ODESSA, MISSURI, ASSIGNOR 0F ONE-HALF TO WILLIAM FORD, OF JERSEYVILLE, ILLINOIS.

LIFTlNG-JACK.

SPECIFICATION lforming part of Letters Patent No. 264,752, dated September 19, 1882,

Application filed July l, 188'2.

as wagons, omnibuses, &c.and differs from other devices of its class in certain details of construction, fully set forth hereinafter, wherehy the implement is rendered unusually powerful, compact, and inexpensive.

In the drawings, Figure lis a side elevation of' the jack. Fig. 2 is an edge view of the sante, and Fig. 3 is a plan view taken in the line aux, Fig. 1.

A and B, Fig. l, represent two sections of the standard, the upper section being adapted to tnove vertically upon the lower one, the parallelism of the two parts being maintained by the two overlapping tongues,j'a11d g, whih slide vertically in guides or loops formed by the iron bands shown ath and at i.

Pivoted at J on the movable section B is a bifnrcated lifting-lever, C, fulcrnmed at its under side upon the two upper ends ot' a vibrating U-shaped fulcrum-bar, b, the lower eX- t tremity of which rests upon the bottom ota vertical slot, l, in the lower section, A, of the jack, and is scoured in position by a pin or screw, m, as shown in the drawings.

Adapted to slide vertically against the front edge oi the movable section B is a triangular block, d, provided upon its beveled edge with a deep notch, u, for the reception of one end of a long iron link, e, the opposite end ot' which engages with the teeth of a ratchet-bar, r, secured, as shown, tothe opposite edge of section B. It will be observed that the link e is (No model.)

of suoli length that when brought to a hori zontal position it will readily clear the teeth of the rack, and consequentlythe block d may be adjusted to any required height, the force with which the movable block is clasped to the section B increasing with the superincntn-YV bent weight.

In order to render the jack self-sustaining in an upright position, the lower section is firmly Secured in a base-plate, a.

In using the device it is placed under the vehicle in such position that the axle will rest on the top of the block d, the latter being moved up or down to suit the height thereof. The long end of the lever is then depressed, as indicated by the arrow s, until the crotch p .of the lever C comes in contact with the point q on the rear edge ofthe fixed section ot' the jack. It will be observed that when the lever `C is thus depressed and the movable section B raised the fulcrum 7c will be at 'i beyond the dotted line t, and will therefore have passed what is commonly termed the dead-center, and will consequently be locked securely in position by the superi'ncnmbent weight.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. In a lifting-jack, the combination of a bifutcated lever, (l, with a U-snaped vibrating fulcruin-bar, b, substantially' as and forthc purpose herein set forth. Y

2. In a lifting-jack,the combination, with the movable section B, of an adjustable block, d, supporting-link c, and rack-bar i', said parts being constructed and combined substantially in the manner and for the purpose herein set forth.

This specication signed and witnessed this 13th day of June, 1882.

E RNES'I QUAST.

Witnesses WALLACE J oNEs, WILLIAM WADDLE. 

